Broom-sewing machine.



BROOM SEWING MACHINE.

APPLICATION FILED 1111.21.1912.

1,167,713. Patented Jan.11, 1916.

3 SHEETS-SHEET 21 [9 a 9w: m ii k V 4 Q m E Q 'J Tl l O' WITNESSES, INVENTOR.

v ITTORNEYS L. PELTON.

BROOM SEWING MACHINE.

APPLICATION FILED-JAIL. 1913.

INVENTOR.

A TTORNEYS.

COLUMBIA PLANOQRAPH (:m, WASHINGTDN, D. c.

rinrrnn srarn rarniair @FFECE.

LEANDER PELTON, OF DES MOINES, IO'WA.

BnooM-siiwme MACHINE.

Lianne.

Application filed January 27, 1913.

To all whom it may concern:

Be it known that I, Lnaxnnu PnLToN, a citizen of the United States, residing at Des Moines, in the county of Polk and State of Iowa, have invented a certain new and useful Broom-Sewing Machine, of which the following is a specification.

In the art of broom sewing as now generally practised, the operator first wraps a piece of twine one or more times around the broom to form a binder and he then advances the broom clamp to position between the needles and then the needles 011 the opposite sides of the broom clamp are alternately reciprocated to engage one end of the twine of which the binder is formed and move said twine back and forth through the broom diagonally to complete a row of stitches. The speed at which the needles may be operated is necessarily limited on account of the fact that a length of twine must be drawn completely through the broom at each needle movement. Hence during the time that the needles are operat-.

ing on the broom the operator is necessarily idle and during the time that the operator is placing a twine upon the broom for a hinder the sewing machine is necessarily inoperative so that considerable time is lost for both of these reasons. It is therefore obviously desirable that the sewing operation be completed as rapidly as possible so that the length of time which the operator is necessarily idle while the machine is sewing is reduced to a minimum.

The object of my invention is to substitute for the single needle heretofore used on each side of the machine a pair of needles and to provide mechanism by which the central portion oi? a length of twine may be wra ed around a broom and both ends thereof may be engaged by the needles at the same time and the sewing be, carried on with four needles instead of two and with both ends of the length of twine-instead of one end only, for the purpose of materially decreasing the length of time necessary to complete a row of stitches through a broom without the necessity of operating the needles at any increase of speed.

A further object is to provide pairs of needles and needle threading devices of simple, durable and inexpensive construction so arranged that the needles need not be provided with latches to cover the needle eyes and yet the needles, after being Specification of Letters Patent.

Patented Jan. it, dilute.

Serial No. 744,577.

threaded with the twine, may be returned through a broom without danger of having the hooks oi the needles engage the broom material around the opening through which the needles were extended; and in this connection it is my object to provide pairs ofneedles of this class with twine engaging hooks 011 their under surfaces, and also to provide twine engaging andholding mechanisms for threading the needles so arranged that the two ends of the twinemay be threaded into the proper ones of the pairs of needles without danger of having any one of the needles engage both ends of the I twine at the same time.

My invention consists broadly in the ar-- rangement in a machine of this class of two pairs of needles and the combination therewith of the means for properly threading the needles, whereby the objects contemplated are attained, as hereinafter more broom sewing machine embodying my invention, part of the track for guiding the broom clamps being broken away. Fig. 2 shows a side elevation of same. Fig. 3 shows an enlarged, detail view illustrating one of the devices "for engaging the ends of a twine and for threading the aid ends into the hooks of a. pair of needles. Fig. at shows a plan view of a pair of needles of the kind employed in my improved machine. Fig. 5 shows a detail view. partly in section, illustrating a part of a. broom, a twine wrapped around the broom and twisted together and supported on the needle threading hooks. It also shows a pair of needles extended through the broom under the binder twine on one side and over the binder twine on the opposite side, and in position to have the ends of the twine threaded into the pair of needles to make the first stitch. Fig. 6 shows a'similar view -with the first stitch completed and the two end portions of the single binder twine extended through the broom. In this view the needles are not illustrated. 7 shows asimilar view illustrating a successive step in the operation and showing theopposite pair of needles inserted through the broom from the other side and in position to be threaded with the two end portions of the twine. Fig. 8 shows a similar view in which the pair of slipped from them.

twine holding jaws, and a pair of the needle threading hooks in the position that these parts would assume while the needles were bein threaded. Fi 10 shows an enlarged,

detail view illustrating the arrangement of the spring on one of the needle threading devices.

The frame of the machine, the broom clamping jaws and the means for operating the needle supporting arms that are herein illustrated and described are substantially the same as are fully illustrated and described in my companion application for U. S. Letters Patent, Serial Number 663,842, filed Dec. 4-, 1911, and reference is hereto made to said companion application for a full and complete disclosure of this part of the mechanism. For this reason it is necessary in this application to refer only to the various parts of this mechanism in a general way.

The frame is indicated generally by the reference numeral 10, the broom clamps by the reference numeral 11, the needle supporting arms by the reference numeral 12 and the means for advancing the broom clamps between the needles and for holding the broom clamps together and for releasing them after they pass beyond the path 0" the needles is indicated by the reference numeral 13. e

Instead of the single needle in each needle supporting arm, I have provided a pair of needles, the body portions of which are indicated by the numerals l t and 15. These needles are preferably curved, as clearly shown in Fig. 1, and have on the under surface of each, near the free end, a hook 16, the vertical dimension of the part of the needle at the hook and including the hook being somewhat less than the vertical diameter of the hook at a point immediately in the rear of the notch which forms the eye of the needle so that when the needle has been passed through a broom, and is being withdrawn the enlarged part of the needle in the rear of the hook will keep the material of the broom separated far enough so that the hook may pass through the opening made by the enlarged part of the needle and without danger of having the hook become caught on the broom corn or other material through which the needle is being drawn. The two needles are preferably clamped in the needle supportingarm by means of a set screw 17',

and. for the purpose of providing means for adjusting the outer ends of the needles toward and from each other, I have provided a set screw 18 seated in one of the needles and designed to engagethe other.

The needle supporting arms are each mounted upon a rock shaft 19 and this rock shaft is arranged at an acute angle relative to a fore-and-aft line through the center of the machine so that the needles stand in position to expand diagonally across the broom clamps. This rock shaft is provided on one end with a crank arm 20 connected by a rod 21 with a crank 22 on the power shaft 23, which latter is driven by a pulley 24 or in any suitable manner. A rotation of the pulley 24L imparts a rocking motion to the shaft 19. Mounted on the power shaft 23 is a cam 25 for purposes hereinafter made clear.

In the operation of sewing it is first necessary to provide a twine 26, the central portion of which is wound around the broom 2? one or more times to form a binder. The two end portions of the twine are then twist ed together, as'shown at 28 in Fig. and it is then necessary to support the ends of he twine so that the needles after having passed through the broom may be engaged by the threading hooks. For the purpose of thus supporting the end portions of the twine, l have provided on each side of the machine a. twine holding device automatically operated in unison with the needles to and release the twine at the proper time in the travel of the needles. This twine engaging device comprises a bar slidingly mounted upon a rod 30. This bar is pivotally connected to a curvet the needle supporting arm 12, as shown in Figs. 1 and 3.

The downward movement of the bar 29 on the rod 30 is iimited by an.

adjustable collar she lower end of the rod 30 is pivoted to a lever which is fulcrumed on a part of the machine frame and which is provided on its end opposite f om the rod 30 with a rod 34 pivoted to the lever and extended downwardly where it is pivoted at its lower end to a lug 85,which lug is connected to the lower one 36 of pair of twine clamping jaws. This lower twine clamping jaw is pivoted at one end to a lever 37. This lever 3'? is fulcrumed on a pin 38, which pin also serves as a fulcrum for the lever The upper end of the lever 37 is connected with a contractihle spring 39 to normally hold the upper end of the lever against a stop 40 that limits movement of the upper end of the lever in one direction, the lever however being free to mov away from the stop against the resiliency of said spring. On the lower end of the lever 37 is an upper twine clamping jaw 41 designed to coact with the jaw 36. One of these jaws is preferably provided with a pin arm 31 fixed to 42 and the other with a hole 43 to receive the pin. A contractible spring 44 is connected to the sliding bar 29 and to the lever 33 to normally hold the end of the lever to which it is attached upwardly.

The practical operation of this twine holding mechanism is as follows: /V hen the needle supporting arm 12 moves in a direction toward the broom clamp the arm 31 thereon moves the slide bar 29 upwardly and elevates the outer end of the lever 33. This moves the lower aw 36 downwardly to open the aw, as shown in Fig. 3. A further movement causes the lower end of the lever 37 to swing toward the right beyond the position shown in Fig. 3. After it has swung to the right a certain distance the two jaws 41 and 36 come together and clamp the twine between them and the twine is then held until, at a certain point in the return movement of the needle bearing arm, the slide bar 29 is lowered, whereupon the lever 33 pulls upwardly on the lower jaw 36 and thus swin s O the lower end of the lever 37 to the left of Fig. 3, and when it has progressed to the point near the position shown in Fig. 3, the jaws are again opened and the twine released. On account of the spring 44 there is a yielding pressure between the jaws 36 and 41. When these jaws are open, as shown in Fig. 3, there is room between them to ad mit the ends of the needles.

The particular twine holding mechanism just described has proven satisfactory in actual use. Obviously other devices for the same purpose may be designed and I do not desire to be understood as limiting myself to this particular construction of twine holding mechanism.

As a means for threading the needles with the two end portions of a twine that are connected to a broom and held-by the twine holder, T have provided the following mechanism: Two rods 45 and 46 are arranged adj acent to each other in substantially upright positions and are slidingly mounted in the bearings 47 and 48 on the machine frame.

At the upper end of each rod is a coil spring 49 fixed at its upper end to the rod and at its lower end to the bearing 47. These springs are so arranged that they cause both rods to rotate within their bearings, and a stop 49 limits this rotary movement. At the lower end of each rod is a hook 50 and means are provided for limiting the downward movement of each rod comprising a collar 51, and a set screw 52. These rods must be elevated at a certain time with re lation to the needle movement, and for this purpose I have provided a lever 53 mounted on a bearing '54 on the frame, which lever 53 is provided with a roller 55 to be engaged by the cam 25. This lever 53 has the rods 45 and 46 extended through it and above and below the lever on the rods are the adjustable collars 56. The practical operation of these twine threading hooks is as follows: hen the hooks are in the position shown in Fig. 3, the needles carry the twine through the broom and between the aws 36 and 41 of the twine holder and one needle goes over one of the hooks 50 and the other needle over the other hook 50. The twine gripping jaws close and engage the twine as soon as the needles have been withdrawn from between them and then the twine gripping jaws move in a direction parallel with the broom clamp to the positions illustrated in Fig. 7, thus causing both ends of the twine to pass around their respective hooks 50. Then just before the hooks of the needles reenter the broom the lever 53 is operated to raise both of the hooks 50 and to engage the twine in the manner shown in Fig. 8, and then move the twine upwardly so that each end portion of the twine partially surrounds one of the needles and then as the needles are further withdrawn into the broom both hooks will be threaded in the manner shown in Fig. 9. Then as the needles further proceed through the broom, as shown in Fig. 8, the tension of the end portions of the twine on the hooks 50 will cause them to twist around to position substantially parallel with the needles so that the twine may readily and easily slip from the hooks and be carried through the broom to complete a stitch.

The needle threading hooks just described have been found to be practical and satis factory in use, but I do not desire to be understood as limiting myself to the particular construction thereof.

Some of the advantages of my invention are that by having the pairs of needles supported on arms swinging above the broom presses, these arms and'the needles themselves do not in any way interfere with the travel of the broom presses. Furthermore by having the pairs of needles curved in the manner shown, they readily and easily enter a broom on one side below the part of the twine that forms a binder, and then as they pass through the broom they come through the broom on the opposite side above the binder.

Another advantage is that by having the hooks on the under sides of the needles, I am able to dispensev with the use of latches for the needle eyes and at the same time simple and positively operating mechanism may be provided for threading the needles without danger of having one needle engage both ends of the twine.

Another advantage is that by having the needles arranged in pairs in the manner shown, an improved product is produced thereby for the reason that where a single needle and piece of twine is used the stitches extend in a zigzag manner through the broom and leave substantially V-shaped pertions of the broom corn extending from one side of the broom to the other between each two stitches, whereas by having the needles arranged in pairs and operated as shown the various stitches cross each other in the center of the broom, thus leaving V -shaped portions of broom corn between the stitches running only from the center of the broom to one side and substantially diamondshaped portions of the broom corn between the said V-shaped portions, thereby making stronger and more desirable row of stitches for a broom and dividing the portions of broom corn into smaller quantities, thus making the broom stiffer at the point where the row of stitches occur.

Another advantage is that by having the needles arranged in pairs, as shown, and in view of the fact that there is a limit to the speed at which the needles may be operated a row of stitches through a broom may be completed in approximately half the time that it would require for needles arranged singly, hence the operator need not stand idle so long as has heretofore been necessary in connection with broom sewing machines employing single needles.

Another advantage is that by having the needles so arranged that they will operate at the same time upon both ends of a twine bound around a broom an operator may apply the twine and pass it around the broom more quickly than with the machines heretofore used because there is no necessity for attaching one end of the twine to the broom as the operator places both ends in position to be engaged by the needles.

Another advantage in connection with the use of my improved machine and which tends to permit an increase in the speed at which the broom sewing machine may be operated is as follows: By having the two ends of a twine both pass through a broom first in one direction and then again through the broom in the other direction the distance between the ends of'one of said portions of twine on one side of the broom may be about twice as far apart as would be necessary in case a single twine passed back and forth through the broom and yet the broom will be. sewed as well or better than would be the case if a single twine were used. By this arrangement the ends of the twine that are left after wrapping the binder portion of the twine around the broom are materially needle supporting arms may be operated at some higher speed on this account and yet the needles will travel through the brooms at about the same speed as would be the case if single needles were used on a long twine and traveling through a longer stroke.

It is to be understood in connection with this invention that the sewing machine is devised and intended and adapted only for the purpose of making a single seam at one time and in order to do this the needles of each pair are necessarily arranged side by side in such relation to each other that a line drawn transversely through both needles will be parallel with the single seam being sewed and in this respect my invention is clearly distinguished from sewing machines of the prior art employing a number of needles each arranged to sew a separate seam and said number of needles being necessarily arranged so that a line drawn through them will be at right angles to the line of the seams being sewed.

I claim as my invention:

1. In a machine of the class described, a means for making a single seam comprising a frame, a supporting means for articles to be sewed, two pairs of needles arranged on opposite sides of said supporting means, the needles of each pair being arranged side by side and in such positions that a line run transversely through the needles will be in the plane of the single seam being sewed and designed to alternately project through the article to be sewed, said needles being so arranged that one pair may engage two portions of twine and pull them through the article to be sewed and the other may then engage the same portions of twine and pull them through the articles to be sewed.

2. In a machine of the class described, a means for naking a single seam comprising a frame, a supporting means for articles to be sewed, two pairs of needles arranged on opposite sides of said supporting means, the needles of each pair being arranged side by side and in such positions that a line run transversely through the needles will be in the plane of the single seam being sewed and designed to alternately project through the articles to be sewed, said needles being so arranged that one pair may engage two pertions of twine and pull them through the article to be sewed and the other may then engage the same portions of twine and pull them through the articles to be sewed, the needles of each pair being arranged adjacent to each other and parallel.

3. In a machine ofthe class described, a means for making a single seam comprising a frame, a supporting means for articles to be sewed, two pairs of needles arranged on opposite sides of said supporting means, the needles of each pair being arranged side by side and in such positions that a line run transversely through the needles will be in the plane of the single seam being sewed and designed to alternately project through the articles to be sewed, said needles being so arranged that one pair may engage two portions of twine and pull them through the articles to be sewed and the other may then engage the same portions of twine and pull them through the articles to be sewed, and means on each side of the supporting means for threading the needles.

i. In a machine of the class described, a means for making a single seam comprising a frame, a supporting means for articles to be sewed, two pairs of needles arranged on opposite sides of said supporting means,the needles of each pair being arranged side by side and in such positions that a line run transversely through the needles will be in the plane of the single seam being sewed and designed to alternately project through the articles to be sewed, said needles being so arranged that one pair may engage two portions of twine and pull them through the articles to be sewed and the other may then en age the same portions of twine and pull them through the articles to be sewed, a twine holder at each side of the supporting means, and two needle threading hooks on each side of the supporting means.

5. In a machine of the class described, a means for making a single seam comprising the combination of a frame, supporting means for an article to be sewed, two swinging arms arranged on opposite sides of the said supporting means, a pair of needles carried by each swinging arm, said pairs designed to be alternately passed through the article to be sewed, and means on each side of the supporting means for holding said twine and threading the needles, the needles of each pair being arranged side by side and in such positions that a line run transversely through the needles will be in the plane of the single seam being sewed.

6. In a machine of the class described, a means for making a single seam comprising the combination of a frame, supporting means for an article to be sewed, two swinging arms arranged on opposite sides of the said supporting means, a pair of needles carried by each swinging arm, the needles being curved in such a. manner that as they pass through the article to be sewed they will move upwardly, the needles of each pair being arranged side by side and in such positions that a line run transversely through the needles will be in the plane of the single seam being sewed.

7. In a machine of the class described, a means for making a single seam comprising the combination of a reciprocating arm, a pair of needles carried by the reciprocating arm and provided with hooks on their under surfaces, and means for holding two portions of twine and for threading said twine into both needles at the same time, one portion of twine in each needle.

8. In a machine of the class described, a means for making a single seam comprising a reciprocating arm, a pair of needles carried thereby and provided with hooks on their under surfaces, means for engaging two portions of twine and moving them across the ends of the needles below the needles, and means for engaging both portions of said twine and moving them upwardly so that one portion of the twine partially surrounds each needle and assumes a position to be engaged by the needle hook.

9 In a machine of the class described, a means for making a single seam comprising the combination of a frame, a supporting device for articles to be sewed, two reciproeating arms, a pair of needles carried by each reciprocating arm and so arranged as to move diagonally through the article to be sewed, said parts also being so arranged that each pair of needles can operate at the same time on both ends of a length of twine to pull said ends through the article to be sewed in such a manner that the completed stitches will cross each other at the center of the article being sewed, the needles of each pair being arranged side by side in such a manner that a line drawn transversely through the needles will be in the plane of the single seam being sewed.

10. In a machine of the class described, a means for making a single seam comprising the combination of a frame, two needle supporting arms, a pair of needles arranged in each needle supporting arm, a supporting device for articles to be sewed, and needle threading devices, said parts being so arranged that a single length of twine may be passed around. the article to be sewed and both ends thereof engaged, one by each needle of one of the pairs of needles and being also so arranged that the completed stitches will cross each other in the central portion of the article being sewed, the needles of each pair being arranged side by side in such a manner that a line drawn transversely through the needles will be in the plane of the single seam being sewed.

Des Moines, Iowa, Jan. 20, 1913.

LEANDER PELTON.

Witnesses M. VVALLACE, S. RoBINsoN.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, D. C." 

